1. In ABC soil, the uppermost zone of soil, containing humus; topsoil. 
   淋溶层在abc层土壤中最上面的一层，含有腐殖土；顶层土壤
2. Plants grow in soil which has a dark colour. This dark soil is humus. 
   植物生长在黑色的土壤里，这种黑色土壤叫腐殖上。
3. the top layer of a soil profile; usually contains humus. 
   土壤层中的顶层；通常含有腐殖土。
4. When the soil is dry, the wind blows it away. Some of the humus is lost; 
   土壤干燥，风就会把它吹跑，会损失一些腐殖土。
5. The soil under the humus is not dark. This lighter soil is rather like sand; It is made of bit of rock. 
   腐殖上下面的土壤并不黑，这种浅色土壤很像沙子，它是由碎石变成的。

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• 1. 大陆腐殖土
  compacted soil 压实土...continental humus soil 大陆腐殖土...cryogenic meadow forest soil 冷结草甸森林土
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